通过使用R,是否可以将2个ggplot放在一起(即,在同一图上),但是具有不同的颜色梯度条?我的代码,例如
def fun(count=0):
if count < 5:
print(count)
count+=1
fun(count)
fun()
产生以下两张图片
相反,我希望能够在一个图中将它们整合在一起,一个红色和黑色的条形图,另一个蓝色和绿色的条形图。
答案 0 :(得分:4)
是的,如果您使用ggnewscale
软件包,则可以:
a <- sample(nrow(iris), 75)
df1 <- iris[a,]
df2 <- iris[-a,]
library(ggnewscale)
ggplot(mapping = aes(Sepal.Width, Sepal.Length)) +
geom_point(data = df1, aes(colour = Petal.Length)) +
scale_colour_gradientn(colours = c("red", "black")) +
# Important: define a colour/fill scale before calling a new_scale_* function
new_scale_colour() +
geom_point(data = df2, aes(colour = Petal.Width)) +
scale_colour_gradientn(colours = c("blue", "white"))
替代方案是relayer软件包,或者是ggnomics中的scale_colour_multi
/ scale_listed
(完全免责声明:我写了ggnomics)。
编辑:以下是替代方法:
library(ggnomics)
# ggnomics scale_colour_multi (for gradientn-like scales)
ggplot(mapping = aes(Sepal.Width, Sepal.Length)) +
geom_point(data = df1, aes(length = Petal.Length)) +
geom_point(data = df2, aes(width = Petal.Width)) +
scale_colour_multi(colours = list(c("red", "black"), c("blue", "white")),
aesthetics = c("length", "width"))
# ggnomics scale_listed (for any non-position scale (in theory))
ggplot(mapping = aes(Sepal.Width, Sepal.Length)) +
geom_point(data = df1, aes(length = Petal.Length)) +
geom_point(data = df2, aes(width = Petal.Width)) +
scale_listed(list(
scale_colour_gradientn(colours = c("red", "black"), aesthetics = "length"),
scale_colour_gradientn(colours = c("blue", "white"), aesthetics = "width")
), replaces = c("colour", "colour"))
library(relayer)
# relayer
ggplot(mapping = aes(Sepal.Width, Sepal.Length)) +
rename_geom_aes(geom_point(data = df1, aes(length = Petal.Length)),
new_aes = c("colour" = "length")) +
rename_geom_aes(geom_point(data = df2, aes(width = Petal.Width)),
new_aes = c("colour" = "width")) +
scale_colour_gradientn(colours = c("red", "black"), aesthetics = "length",
guide = guide_colourbar(available_aes = "length")) +
scale_colour_gradientn(colours = c("blue", "white"), aesthetics = "width",
guide = guide_colourbar(available_aes = "width"))
所有其他选择都会发出有关未知美学的警告,但这与生成的图无关紧要。 ggplot的layer()
函数中只有一行代码会产生此警告,如果不重新编码每个geom
包装器,或者像ggnewscale一样,重命名旧的外观,就无法解决这个问题提供新的美学。这些图看起来都差不多,因此我认为不必再次发布它们。